Which of the four types of organic molecules contain the element nitrogen?

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!

The primary products of complete combustion of fossil fuels are a. carbon dioxide and water b. methane and water c. carbon monoxide and water d. carbon dioxide and carbon monoxide

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?